X0609 4 2026-09-15 0 0001539838 Diamondback Energy, Inc. FANG 0001333454 Meloy Charles Alvin false 500 WEST TEXAS AVENUE SUITE 100 MIDLAND TX 79701 1 0 0 0 0 Common Stock 2026-09-15 4 G 0 25000 0 D 793197 I Wolfrock Energy, LLC Common Stock 2026-09-15 5 G 0 E 12500 0 A 12500 I Katy Evans Meloy 2011 Trust Common Stock 2026-09-15 5 G 0 E 12500 0 A 12500 I Grady Allen Meloy 2011 Trust Common Stock 2026-09-16 4 G 0 12500 0 D 0 I Katy Evans Meloy 2011 Trust Common Stock 2026-09-16 4 G 0 12500 0 D 0 I Grady Allen Meloy 2011 Trust Common Stock 2026-09-16 5 G 0 E 25000 0 A 28257 D On September 15, 2026, Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person, gifted 12,500 shares to the Katy Evans Meloy 2011 Trust and 12,500 shares to the Grady Allen Meloy 2011 Trust. These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person. Mr. Meloy is a trustee of each of the Katy Evans Meloy 2011 Trust and the Grady Allen Meloy 2011 Trust. On September 16, 2026, all of the issuer's securities held by the Katy Evans Meloy 2011 Trust and the Grady Allen Meloy 2011 Trust were gifted to a community property account held by Mr. Meloy and his spouse. /s/ Matt Zmigrosky, as attorney-in-fact for Charles A. Meloy 2026-09-17